DE19706427A1 - Pressure fluid accumulator - Google Patents

Pressure fluid accumulator

Info

Publication number
DE19706427A1
DE19706427A1 DE19706427A DE19706427A DE19706427A1 DE 19706427 A1 DE19706427 A1 DE 19706427A1 DE 19706427 A DE19706427 A DE 19706427A DE 19706427 A DE19706427 A DE 19706427A DE 19706427 A1 DE19706427 A1 DE 19706427A1
Authority
DE
Germany
Prior art keywords
bellows
pressure fluid
fluid accumulator
accumulator according
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19706427A
Other languages
German (de)
Inventor
Robert Mutschler
Manfred Rueffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Teves AG and Co OHG
Original Assignee
ITT Manufacturing Enterprises LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7820750&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE19706427(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ITT Manufacturing Enterprises LLC filed Critical ITT Manufacturing Enterprises LLC
Priority to DE19706427A priority Critical patent/DE19706427A1/en
Priority to US09/367,368 priority patent/US6189572B1/en
Priority to JP53622698A priority patent/JP2001513724A/en
Priority to PCT/EP1998/000808 priority patent/WO1998037329A1/en
Priority to EP98908092A priority patent/EP0961883B1/en
Priority to DE59802437T priority patent/DE59802437D1/en
Publication of DE19706427A1 publication Critical patent/DE19706427A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/148—Arrangements for pressure supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4068—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system the additional fluid circuit comprising means for attenuating pressure pulsations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports

Abstract

The invention relates to a pressure accumulator with a housing (1) that has a pressure connection (5) and a body movably lodged inside the housing (1) and separating at least two chambers (2, 11) from each other in the pressure accumulator. The body is configured as metallic bellows (3), movably lodged in the housing (1) and enclosing one chamber (2).

Description

Die Erfindung betrifft einen Druckmittelspeicher, insbesondere für schlupfgeregelte Kraftfahrzeugbremsanlagen nach dem Ober­ begriff des Patentanspruchs 1.The invention relates to a pressure medium reservoir, in particular for slip-controlled motor vehicle brake systems according to the upper Concept of claim 1.

Hydrospeicher der im Oberbegriff des Patentanspruchs 1 angege­ benen Art weisen in der Regel elastomere Dichtelemente auf, wobei durch eine Bauart des Druckmittelspeichers als Kolben­ speicher (vgl. hierzu DE 41 41 929 A1) oder als Membranspei­ cher (vgl. hierzu DE 41 31 524 A1) in Abhängigkeit des Parti­ aldrucks das im Druckmittelspeicher häufig unter hohem Druck stehende Gas über die Dichtung bzw. Membran in die Bremsflüs­ sigkeit defundiert. Daher muß bei diesen Druckmittelspeichern das Gasvolumen entsprechend an die zu erwartenden Diffusion angepaßt werden. Daher ist es gerade bei Verwendung eines sol­ chen Druckmittelspeichers für Kraftfahrzeugbremsanlagen not­ wendig, daß das Gas wieder aus der Bremsflüssigkeit entweichen kann, um eine Betriebsstörung der Bremse zu verhindern.Hydraulic accumulator specified in the preamble of claim 1 benen type usually have elastomeric sealing elements, whereby by a design of the pressure medium accumulator as a piston memory (cf. DE 41 41 929 A1) or as a membrane spit cher (cf. DE 41 31 524 A1) depending on the part aldrucks that in the pressure medium storage often under high pressure standing gas through the seal or membrane in the brake fluid liquid defused. Therefore, in these pressure medium stores the gas volume corresponding to the expected diffusion be adjusted. Therefore, it is especially when using a sol Chen pressure medium storage for motor vehicle brake systems not agile that the gas can escape from the brake fluid again to prevent the brake from malfunctioning.

Daher ist es die Aufgabe der Erfindung, einen Druckmittelspei­ cher der eingangs genannten Art mit einfachen, kostengünstigen und funktionssicheren Mitteln zu entwickeln, der die zum Stand der Technik zuvor genannten Nachteile nicht aufweist.It is therefore the object of the invention to provide a pressure medium feed cher of the type mentioned with simple, inexpensive and reliable means to develop that to the stand the technology does not have the aforementioned disadvantages.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the characterizing Features of claim 1 solved.

Weitere Merkmale, Vorteile und Anwendungsmöglichkeiten der Erfindung gehen im Nachfolgenden aus den Unteransprüchen und aus der Beschreibung eines konstruktiven Ausführungsbeispieles hervor, dessen Wirkungsweise anhand eines Diagramms verdeut­ licht wird.Other features, advantages and possible uses of the In the following go from the dependent claims and from the description of a constructive embodiment  whose mode of operation is illustrated by a diagram light becomes.

Es zeigen somit:They show:

Fig. 1 einen Längsschnitt durch eine vorteilhafte Ausführungs­ form des Erfindungsgegenstandes, Fig. 1 shows a longitudinal section through an advantageous execution form of the subject invention,

Fig. 2 den charakteristischen Kennlinienverlauf des Erfin­ dungsgegenstandes. Fig. 2 shows the characteristic curve of the inven tion object.

Die Fig. 1 zeigt in erheblich vergrößertem Maßstab skizziert einen Druckmittelspeicher, der insbesondere für schlupfgere­ gelte Kraftfahrzeugbremsanlagen verwendet werden kann. Hierzu weist das topfförmige Gehäuse 1 einen mit der Bremsanlage in Verbindung bringbaren Druckmittelanschluß 5 auf. Erfindungs­ gemäß befindet sich in dem Druckmittelspeicher ein im Gehäuse 1 befestigter Faltenbalg 3, der eine Kammer 2 umschließt, die mit einem in der Regel unter hohem Druck stehenden Gas befüllt ist. Damit das Gas nicht über die Wandung des Faltenbalges 3 aus seiner Kammer 2 in eine außerhalb des Faltenbalges 3 gele­ gene, über den Druckmittelanschluß 5 mit der Bremsanlage in Verbindung stehende Kammer 11 gelangen kann, wird bei der Ge­ staltung des Faltenbalges 3 bewußt auf elastomere Bauelemente verzichtet und dementsprechend erfindungsgemäß ausschließlich Metall für die Herstellung des Faltenbalges 3 verwendet. An der Stirnfläche des topfförmigen Faltenbalges 3 ist ein Feder­ element 4 befestigt, das ein dem Druckmittelanschluß 5 zuge­ wandtes Ventilelement 6 trägt. Ferner befindet sich innerhalb des Faltenbalges 3 ein vorzugsweise aus Kunststoff bestehender Innenkörper 7, dessen Dimensionierung die Druckaufnahmecharak­ teristik des Druckmittelspeichers bestimmt und gleichzeitig als Anschlag für die Stirnfläche des Faltenbalges 3 genutzt werden kann. Der topfförmige Faltenbalg 3 ist mit seinem offe­ nen Endbereich zwischen dem topfförmigen Gehäuse 1 und dem als Deckel ausgebildeten Verschlußelement 9 eingespannt sowie gleichzeitig dazwischen abgedichtet. Durch das deckelförmige Verschlußelement 9 erstreckt sich ein kanalförmiger Füllan­ schluß 8, der vorzugsweise durch den das Speicherverhalten charakterisierenden Innenkörper 7 in die vom Faltenbalg 3 um­ schlossene Kammer 2 einmündet. Abbildungsgemäß ist dieser für das Gas vorgesehene Füllanschluß 8 mittels einer Dichtschraube 12 verschlossen, die gleichzeitig den zylinderförmigen Innen­ körper 7 am deckelförmigen Verschlußelement 9 teilweise durch­ dringt. Sowohl das Gehäuse 1 als auch der Faltenbalg 3 sind vorzugsweise durch ein Tiefziehverfahren zu der abbildungs­ gemäßen Topfform ausgestaltet, wobei bezüglich der Mantelflä­ che des Faltenbalges 3 die Wellenkontur zur Herstellung des Balgs mittels eines Formpreßverfahrens zustande kommt. Das am Federelement 4 befestigte Ventilelement 6 ist vorzugsweise mit einem vulkanisierten Dichtelement 10 versehen, wodurch sich eine besonders einfache und sichere Abdichtung der Kammer 11 gegenüber dem Druckmittelanschluß 5 im Gehäuse 1 ergibt. Fig. 1 shows, in greatly enlarged scale outlines a pressure medium store, which can be used in particular for automotive vehicle brake systems schlupfgere applies. For this purpose, the cup-shaped housing 1 has a pressure medium connection 5 which can be connected to the brake system. According to the invention, a bellows 3 fastened in the housing 1 and enclosing a chamber 2 , which is filled with a gas which is generally under high pressure, is located in the pressure medium reservoir. So that the gas can not get over the wall of the bellows 3 from its chamber 2 into a gel outside of the bellows 3 , via the pressure medium connection 5 with the brake system communicating chamber 11 , the design of the bellows 3 is deliberately based on elastomeric components waived and accordingly used according to the invention exclusively metal for the manufacture of the bellows 3 . On the end face of the cup-shaped bellows 3 , a spring element 4 is attached, which carries a pressure medium connection 5 facing valve element 6 . Furthermore, inside the bellows 3 there is an inner body 7 , preferably made of plastic, the dimensions of which determine the pressure recording characteristic of the pressure medium reservoir and, at the same time, can be used as a stop for the end face of the bellows 3 . The cup-shaped bellows 3 is clamped with its open end region between the cup-shaped housing 1 and the closure element 9 designed as a cover and at the same time sealed in between. Through the lid-shaped closure element 9 extends a channel-shaped Füllan circuit 8 , which preferably opens through the inner body 7 , which characterizes the storage behavior, into the chamber 2 closed by the bellows 3 . According to the illustration, this filling port 8 , which is provided for the gas, is closed by means of a sealing screw 12 which at the same time partially penetrates the cylindrical inner body 7 on the lid-shaped closure element 9 . Both the housing 1 and the bellows 3 are preferably designed by a deep-drawing process to the pot shape according to the figure, with respect to the mantle surface of the bellows 3, the wave contour for producing the bellows by means of a compression molding process. The valve element 6 attached to the spring element 4 is preferably provided with a vulcanized sealing element 10 , which results in a particularly simple and secure sealing of the chamber 11 with respect to the pressure medium connection 5 in the housing 1 .

Somit lassen sich in einer Zusammenschau nachfolgende Vorteile verdeutlichen:Thus, the following advantages can be summarized clarify:

Das Verschlußelement 9 verbindet das Gehäuse 1 und den Falten­ balg 3 zu einer stabilen, einfach herzustellenden Einheit.The closure element 9 connects the housing 1 and the bellows 3 to a stable, easy to manufacture unit.

Das vorzugsweise als Tiefziehteil hergestellte topfförmige Gehäuse 1 kann im Bereich des Druckmittelanschlusses 5, der am Topfboden gelegen ist, relativ leicht mit einem Anschlußge­ winde (Innen-/oder Außengewinde) versehen werdend wobei sich der Druckmittelspeicher auch als Einschraub- bzw. Anschraub­ speicher an das angeschlossene System eignet. The pot-shaped housing 1 , which is preferably manufactured as a deep-drawn part, can be relatively easily provided with a connecting thread (internal or external thread) in the area of the pressure medium connection 5 , which is located at the bottom of the pot, the pressure medium accumulator also being a screw-in or screw-on accumulator connected system.

Der Füllanschluß 8 bildet im Hinblick auf seine Konstruktion einen Standard- als auch Serienteil, insbesondere in der ge­ zeigten Ausführungsform.The filler port 8 forms a standard and series part with regard to its construction, in particular in the embodiment shown.

Das als Sitzventil ausgeführte Ventilelement 6 weist einen Flachsitz auf, wodurch sich eine genaue Zentrierung gegenüber dem Druckmittelanschluß 5 erübrigt. Das eventuell anvulkani­ sierte Dichtelement 10 gewährleistet bei erhöhten Anpreßdrüc­ ken des Ventilelementes 6 auf die Gehäusebohrung des Druck­ mittelanschlusses 5 eine günstige, sich verstärkende Dicht­ wirkung.The valve element 6 designed as a seat valve has a flat seat, as a result of which there is no need for precise centering relative to the pressure medium connection 5 . The possibly anvulkani-based sealing element 10 ensures at favorable Anpreßdrüc ken the valve element 6 on the housing bore of the pressure medium connection 5 a favorable, reinforcing sealing effect.

Das Federelement 4 sorgt zweckmäßigerweise für eine Entkoppe­ lung des Faltenbalges 3 vom Druckmittelanschluß 5, wodurch etwaige Konzentrizitätstoleranzen des Faltenbalges 3 ausgegli­ chen und toleriert werden können. Weiterhin bietet diese Fe­ derelement 4 eine Sicherheitsfunktion für das Ventilelement 6, wenn sich infolge einer Druckmittelleckage in der Kammer 11 der Faltenbalg 3 soweit ausdehnen kann, bis das Ventilelement 6 und der Faltenbalg 3 - infolge des zusammengedrückten Feder­ elementes 4 - direkt aufeinander einwirken. Durch das Flächenübersetzungs­ verhältnis des Balgquerschnittes zum Auslaßquerschnitt am Druckmittelanschluß 5 ergibt sich entsprechend dem Gasinnen­ druck in der Kammer 2 ein sicheres Schließen des Ventilelemen­ tes 6, womit eine weitere Druckmittelleckage verhindert ist.The spring element 4 expediently ensures a decoupling of the bellows 3 from the pressure medium connection 5 , whereby any concentricity tolerances of the bellows 3 can be compensated for and tolerated. Furthermore, this Fe derelement 4 offers a safety function for the valve element 6 when the bellows 3 can expand as far as a result of a pressure fluid leakage in the chamber 11 until the valve element 6 and the bellows 3 - due to the compressed spring element 4 - act directly on one another. Due to the area ratio of the bellows cross-section to the outlet cross-section at the pressure medium connection 5 , a corresponding closing of the valve elements 6 results in accordance with the internal gas pressure in the chamber 2 , thus preventing further pressure medium leakage.

FunktionsmerkmaleFeatures

Aufgrund der im Druckmittelspeicher maximal zulässigen und damit begrenzten Drucküberhöhung, muß für die Konstruktion des Faltenbalges 3 gewährleistet werden, daß der Flüssigkeitsdruck in der Kammer 11 immer größer als der Gasdruck in der Kammer 2 ist, damit außerhalb des Faltenbalges 3 die zulässige Druck­ überhöhung eingehalten wird. Da dieser maximal zulässige Au­ ßenüberdruck bei einem einlagigen Faltenbalg bei ca. 40 bar liegt, wird der Druckmittelspeicher gleichzeitig sowohl über den Füllanschluß 8 mit Gas als auch über den Druckmittelan­ schluß 5 mit Druckmittel bzw. Bremsflüssigkeit befüllt. Damit ergibt sich der im Diagramm nach Fig. 2 dargelegte untere Druckarbeitspunkt A.Due to the maximum permitted and thus limited pressure increase in the pressure medium reservoir, it must be ensured for the construction of the bellows 3 that the liquid pressure in the chamber 11 is always greater than the gas pressure in the chamber 2 , so that the permitted pressure increase is maintained outside the bellows 3 . Since this maximum permissible outside pressure in a single-layer bellows is approx. 40 bar, the pressure medium reservoir is simultaneously filled with pressure medium or brake fluid both via the filling connection 8 with gas and via the pressure medium connection 5 . This results in the lower pressure operating point A shown in the diagram according to FIG. 2.

Bei einem geringfügig über den Außenüberdruck erhöhten Gas­ druck im Faltenbalg 3 verschließt das Ventilelement 6 den Druckmittelanschluß 5. Je stärker der Druck der Bremsflüssig­ keit in der Kammer 11 bzw. am Druckmittelanschluß 5 des Brems­ systems abfällt, umso stärker ist die Dichtwirkung des Ventil­ elementes 6 am Ventilsitz (Druckmittelanschluß 5) aufgrund der erhöhten Flächenpressung.If the gas pressure in the bellows 3 increases slightly above the external pressure, the valve element 6 closes the pressure medium connection 5 . The more the pressure of the brake fluid drops in the chamber 11 or at the pressure medium connection 5 of the brake system, the stronger the sealing effect of the valve element 6 on the valve seat (pressure medium connection 5 ) due to the increased surface pressure.

Das Diagramm nach Fig. 2 veranschaulicht den Kennlinienverlauf in Abhängigkeit der Druckänderung im Druckspeicher über den Federweg des Faltenbalges 3. Hierbei entspricht die obere Kennlinie B der Druckänderung der Bremsflüssigkeit, die untere Kennlinie C gibt die Druckänderung des Gases in Abhängigkeit des Federweges des Faltenbalges 3 an. Entsprechend dem Aus­ legungskriterium ergibt sich somit für den vorgestellten Druckmittelspeicher bei maximalem Hub des Faltenbalges die voran bezeichnete Drucküberhöhung als zulässiger Differenz­ druck von 40 bar.The diagram of Fig. 2 illustrates the characteristic curve depending on the change in pressure in the pressure accumulator over the spring travel of the bellows. 3 The upper characteristic curve B corresponds to the change in pressure of the brake fluid, the lower characteristic curve C indicates the change in pressure of the gas as a function of the spring travel of the bellows 3 . According to the design criterion, the pressure increase referred to above thus results for the pressure medium reservoir presented at maximum stroke of the bellows as a permissible differential pressure of 40 bar.

Bei Wunsch oder Bedarf kann auf eine Gasbefüllung des Falten­ balges 3 verzichtet werden. Die Federsteifigkeit des Metall­ balges und dessen Festigkeit erlauben dann die Darstellung eines sog. Mitteldruckspeichers anstelle des aus dem Diagramm nach Fig. 2 dargestellten Hochdruckspeichers. Beim Einsatz des Erfindungsgegenstandes als Mitteldruckspeicher können folglich der Füllanschluß 8, der Innenkörper 7, das Ventilelement 6 und das Federelement 5 entfallen.If desired or required, gas filling of the bellows 3 can be dispensed with. The spring stiffness of the metal bellows and its strength then allow the representation of a so-called medium pressure accumulator instead of the high pressure accumulator shown in the diagram in FIG. 2. When using the subject matter of the invention as a medium pressure accumulator, the filling connection 8 , the inner body 7 , the valve element 6 and the spring element 5 can consequently be omitted.

Unabhängig davon, ob nunmehr der Erfindungsgegenstand als Hochdruck- oder Mitteldruckspeicher verwendet wird, ergeben sich für den Erfindungsgegenstand technische Vorteile, die sich insbesondere durch die absolute Gasdichtheit, Wartungs­ freiheit, Anpassung des Speicherverhaltens an verschiedene Druckarbeitspunkte mittels des Innenkörpers 7 auszeichnen. Weitere Vorteile sind in der verschleißfreien Betriebsweise und einfachen Konstruktion zu sehen, wobei insbesondere durch einen extrem hohen Berstdruck des Faltenbalges 3, der etwa beim 10fachen des zulässigen Überdrucks liegt, extrem hohe Sicherheitsreserven vorliegen. Ferner sind die produktions­ technischen Vorteile zu erwähnen, die darin gesehen werden können, daß keine Präzisionsteile und keine feinbearbeiteten Oberflächen notwendig sind. Die Abdichtung des Faltenbalges 3 zwischen dem Gehäuse 1 und dem deckelförmigen Verschlußelement 9 kann überdies automatengerecht mittels einer Schweißnaht geschehen. Regardless of whether the subject of the invention is now used as a high-pressure or medium-pressure accumulator, there are technical advantages for the subject of the invention, which are characterized in particular by the absolute gas-tightness, freedom from maintenance, adaptation of the storage behavior to different pressure operating points by means of the inner body 7 . Further advantages can be seen in the wear-free mode of operation and simple construction, with extremely high safety reserves in particular due to an extremely high bursting pressure of the bellows 3 , which is approximately 10 times the permissible excess pressure. Furthermore, the production-technical advantages are to be mentioned, which can be seen in the fact that no precision parts and no finely machined surfaces are necessary. The sealing of the bellows 3 between the housing 1 and the lid-shaped closure element 9 can moreover be carried out in an automated manner by means of a weld seam.

BezugszeichenlisteReference list

11

Gehäuse
casing

22nd

Kammer
chamber

33rd

Faltenbalg
Bellows

44th

Federelement
Spring element

55

Druckmittelanschluß
Pressure fluid connection

66

Ventilelement
Valve element

77

Innenkörper
Inner body

88th

Füllanschluß
Filling connection

99

Verschlußelement
Closure element

1010th

Dichtelement
Sealing element

1111

Kammer
chamber

1212th

Dichtschraube
Sealing screw

Claims (10)

1. Druckmittelspeicher, insbesondere für schlupfgeregelte Kraftfahrzeugbremsanlagen, mit einem einen Druckmittelan­ schluß aufweisenden Gehäuse und einem im Gehäuse beweglich angeordneten, mindestens zwei Kammern im Druckmittelspei­ cher voneinander trennenden Körper, dadurch gekennzeichnet, daß der Körper als im Gehäuse (1) beweglicher, die eine Kammer (2) umschließender Faltenbalg (3) ausgebildet ist.1. Pressure fluid accumulator, in particular for slip-controlled motor vehicle brake systems, with a housing having a pressure medium circuit and a movably arranged in the housing, at least two chambers in the Druckmittelspei cher separating body, characterized in that the body than in the housing ( 1 ) more mobile, the one chamber ( 2 ) enclosing bellows ( 3 ) is formed. 2. Druckmittelspeicher nach Anspruch 1, dadurch gekennzeich­ net, daß die vom Faltenbalg (3) umschlossene Kammer (2) mit einem Gas befüllt ist.2. Pressure fluid accumulator according to claim 1, characterized in that the bellows ( 3 ) enclosed chamber ( 2 ) is filled with a gas. 3. Druckmittelspeicher nach Anspruch oder 2, dadurch gekenn­ zeichnet, daß der Faltenbalg (3) aus einem Metall besteht.3. Pressure fluid accumulator according to claim or 2, characterized in that the bellows ( 3 ) consists of a metal. 4. Druckmittelspeicher nach einem der vorhergehenden Ansprü­ che, dadurch gekennzeichnet, daß an der Stirnfläche des Faltenbalges (3) ein Federelement (4) befestigt ist, das ein dem Druckmittelanschluß (5) zugewandtes Ventilelement (6) trägt.4. Pressure medium accumulator according to one of the preceding claims, characterized in that a spring element ( 4 ) is attached to the end face of the bellows ( 3 ) and carries a valve element ( 6 ) facing the pressure medium connection ( 5 ). 5. Druckmittelspeicher nach einem der vorhergehenden Ansprü­ che, dadurch gekennzeichnet, daß im Faltenbalg (3) ein vor­ zugsweise aus Kunststoff bestehender Innenkörper (7) posi­ tioniert ist.5. Pressure fluid accumulator according to one of the preceding Ansprü surface, characterized in that in the bellows ( 3 ) a before preferably made of plastic inner body ( 7 ) is posi tioned. 6. Druckmittelspeicher nach einem der vorhergehenden Ansprü­ che, dadurch gekennzeichnet, daß der Faltenbalg (3) einen Füllanschluß (8) aufnimmt, der vorzugsweise durch einen das Speicherverhalten charakterisierenden Innenkörper (7) in die eine vom Faltenbalg (3) umschlossene Kammer (2) ein­ mündet. 6. Pressure fluid accumulator according to one of the preceding claims, characterized in that the bellows ( 3 ) receives a filling connection ( 8 ), which is preferably characterized by an inner body characterizing the storage behavior ( 7 ) into a chamber ( 2 ) enclosed by the bellows ( 3 ). one flows. 7. Druckmittelspeicher nach Anspruch 1, dadurch gekennzeich­ net, daß der Faltenbalg (3) mit seinem offenen Endbereich zwischen dem Gehäuse (1) und dem als Deckel ausgebildeten Verschlußelement (9) befestigt sowie abgedichtet ist.7. Pressure fluid accumulator according to claim 1, characterized in that the bellows ( 3 ) with its open end region between the housing ( 1 ) and the closure element designed as a lid ( 9 ) is attached and sealed. 8. Druckmittelspeicher nach Anspruch 1, dadurch gekennzeich­ net, daß das Gehäuse (1) als Tiefziehteil ausgebildet ist.8. Pressure fluid accumulator according to claim 1, characterized in that the housing ( 1 ) is designed as a deep-drawn part. 9. Druckmittelspeicher nach Anspruch 4, dadurch gekennzeich­ net, daß das Ventilelement (6) als Sitzventil wirksam ist, das mit einem Dichtelement (10) versehen ist.9. Pressure fluid accumulator according to claim 4, characterized in that the valve element ( 6 ) is effective as a seat valve, which is provided with a sealing element ( 10 ). 10. Druckmittelspeicher nach einem der vorhergehenden Ansprü­ che 1 bis 7, dadurch gekennzeichnet, daß der Faltenbalg (3) durch ein Tiefziehverfahren zu einer Topfform ausgestaltet ist, dessen Mantelfläche vorzugsweise durch Formpressen die Wellenkontur eines Faltenbalges (3) aufweist.10. Pressure fluid accumulator according to one of the preceding claims 1 to 7, characterized in that the bellows ( 3 ) is designed by a deep-drawing process to a pot shape, the outer surface of which preferably has the corrugated contour of a bellows ( 3 ) by compression molding.
DE19706427A 1997-02-19 1997-02-19 Pressure fluid accumulator Withdrawn DE19706427A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19706427A DE19706427A1 (en) 1997-02-19 1997-02-19 Pressure fluid accumulator
US09/367,368 US6189572B1 (en) 1997-02-19 1998-02-13 Pressure accumulator
JP53622698A JP2001513724A (en) 1997-02-19 1998-02-13 Pressure fluid accumulator
PCT/EP1998/000808 WO1998037329A1 (en) 1997-02-19 1998-02-13 Pressure accumulator
EP98908092A EP0961883B1 (en) 1997-02-19 1998-02-13 Pressure accumulator
DE59802437T DE59802437D1 (en) 1997-02-19 1998-02-13 PRESSURE MEDIUM STORAGE

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DE19706427A DE19706427A1 (en) 1997-02-19 1997-02-19 Pressure fluid accumulator

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DE19706427A1 true DE19706427A1 (en) 1998-08-20

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DE59802437T Expired - Fee Related DE59802437D1 (en) 1997-02-19 1998-02-13 PRESSURE MEDIUM STORAGE

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US (1) US6189572B1 (en)
EP (1) EP0961883B1 (en)
JP (1) JP2001513724A (en)
DE (2) DE19706427A1 (en)
WO (1) WO1998037329A1 (en)

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EP0980981A1 (en) 1998-08-17 2000-02-23 Continental Teves AG & Co. oHG Fluid pressure accumulator
DE19911030A1 (en) * 1998-08-17 2000-02-24 Continental Teves Ag & Co Ohg Pressure fluid accumulator
DE19852628A1 (en) * 1998-11-14 2000-05-25 Integral Accumulator Kg Hydraulic storage device with metal folding bellows dividing wall has center of weld seam located in butt joint between housing parts or between one part and lateral collar surface
WO2000073663A1 (en) * 1999-05-29 2000-12-07 Hydac Technology Gmbh Hydropneumatic pressure accumulator
DE10101854A1 (en) * 2000-08-30 2002-06-13 Continental Teves Ag & Co Ohg Holding reservoir for pressurised fluid sub-divided into two chambers by a panel linked to the base discharge valve
DE10142038A1 (en) * 2001-02-23 2002-09-05 Continental Teves Ag & Co Ohg Pressure medium store, for an electro-hydraulic vehicle brake system, has bellows within a housing to give separated pressure zones in an inexpensive structure
DE10119357A1 (en) * 2001-04-20 2002-10-31 Bosch Gmbh Robert Hydraulic energy storage with a bellows with a testable end position seal
DE10214871A1 (en) * 2001-10-16 2003-04-24 Continental Teves Ag & Co Ohg Pressure medium reservoir for gas and liquid has metal bellows bag linked via spring to valve closure
DE10233481A1 (en) * 2002-07-24 2004-02-12 Hydraulik-Ring Gmbh Storage for a liquid medium
DE10304999A1 (en) * 2003-02-07 2004-08-19 Carl Freudenberg Kg Metal bellows compression storage for motor vehicle hydraulic braking systems has a compression container with one chamber for compressed gas and another chamber for hydraulic fluid
DE10022813C5 (en) * 2000-05-10 2008-07-24 Daimler Ag Safety device for the storage of pedals
WO2014118479A1 (en) * 2013-02-04 2014-08-07 Vianney Rabhi Pressure accumulator for a motor pump assembly
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Publication number Priority date Publication date Assignee Title
DE19911030A1 (en) * 1998-08-17 2000-02-24 Continental Teves Ag & Co Ohg Pressure fluid accumulator
EP0980981A1 (en) 1998-08-17 2000-02-23 Continental Teves AG & Co. oHG Fluid pressure accumulator
DE19852628B4 (en) * 1998-11-14 2005-09-15 Integral Accumulator Kg Hydrospeicher with a metal bellows as a partition
DE19852628A1 (en) * 1998-11-14 2000-05-25 Integral Accumulator Kg Hydraulic storage device with metal folding bellows dividing wall has center of weld seam located in butt joint between housing parts or between one part and lateral collar surface
WO2000073663A1 (en) * 1999-05-29 2000-12-07 Hydac Technology Gmbh Hydropneumatic pressure accumulator
DE10022813C5 (en) * 2000-05-10 2008-07-24 Daimler Ag Safety device for the storage of pedals
DE10101854A1 (en) * 2000-08-30 2002-06-13 Continental Teves Ag & Co Ohg Holding reservoir for pressurised fluid sub-divided into two chambers by a panel linked to the base discharge valve
DE10142038A1 (en) * 2001-02-23 2002-09-05 Continental Teves Ag & Co Ohg Pressure medium store, for an electro-hydraulic vehicle brake system, has bellows within a housing to give separated pressure zones in an inexpensive structure
DE10119357C2 (en) * 2001-04-20 2003-11-27 Bosch Gmbh Robert Hydraulic energy storage with a bellows with a testable end position seal
DE10119357A1 (en) * 2001-04-20 2002-10-31 Bosch Gmbh Robert Hydraulic energy storage with a bellows with a testable end position seal
DE10214871A1 (en) * 2001-10-16 2003-04-24 Continental Teves Ag & Co Ohg Pressure medium reservoir for gas and liquid has metal bellows bag linked via spring to valve closure
DE10233481A1 (en) * 2002-07-24 2004-02-12 Hydraulik-Ring Gmbh Storage for a liquid medium
DE10304999A1 (en) * 2003-02-07 2004-08-19 Carl Freudenberg Kg Metal bellows compression storage for motor vehicle hydraulic braking systems has a compression container with one chamber for compressed gas and another chamber for hydraulic fluid
US8840196B2 (en) 2007-09-05 2014-09-23 Continental Teves Ag & Co. Ohg Brake system for a motor vehicle
WO2014118479A1 (en) * 2013-02-04 2014-08-07 Vianney Rabhi Pressure accumulator for a motor pump assembly
FR3001777A1 (en) * 2013-02-04 2014-08-08 Vianney Rabhi PRESSURE ACCUMULATOR

Also Published As

Publication number Publication date
DE59802437D1 (en) 2002-01-24
JP2001513724A (en) 2001-09-04
EP0961883B1 (en) 2001-12-12
EP0961883A1 (en) 1999-12-08
WO1998037329A1 (en) 1998-08-27
US6189572B1 (en) 2001-02-20

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